Network, generic (extended)

U3002 Vehicle Identification Number

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

With U3002 a module reports that its own stored VIN is either blank or differs from the VIN that the rest of the car sends on the bus. GM's front camera module splits this into :51, memory still erased, and :56, any digit not matching the broadcast VIN; both run at start-up in Run with 9–16 V and do not light the MIL. Ford's SSM 51903 covers Ford- and Lincoln-badged 2021–2023 vehicles whose cruise, blind-spot and other modules store U2100 or U3002 after replacement, fixed by writing VIN and configuration in FDRS; SSM 53569 adds that a tail lamp moved from another car can trigger it. CARB requires the VIN to be readable through the diagnostic connector, which is why modules check it. The typical case is a used or unprogrammed part.

Likely causes

Used module or lamp from another vehicle still holding its old VIN
New module fitted without writing VIN and configuration
Programming session broken off, leaving the VIN memory blank

Symptoms

  • Stored code right after a module or lamp replacement
  • Driver assistance or the affected function disabled until the VIN is written

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–250
Time0.3–1 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

control modulemodule eeprom

Related codes

U3000P0630P0602

References: gsi.ext.gm.com, static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.